The hydrosphere (water, ice, and vapor) is the focus of this GLOBE eTraining module. Protocols for investigating many characteristics of water such as temperature, transparency, electrical conductivity, pH, dissolved oxygen, salinity, nitrates, and...(View More) identifying mosquito larvae are explained. In addition, each module includes interactive digital field and lab experiences, and online assessments. Instructions for uploading observations to the GLOBE database as well as for using the GLOBE visualization system are provided. GLOBE eTraining provides the opportunity for new and experienced GLOBE users to complete science protocol training online. In addition, each module also includes interactive digital field and lab experiences, and online assessments. GLOBE (Global Learning and Observation to Benefit the Environment) is a worldwide, hands-on, K-12 school-based science education program.(View Less)